Improvement in cotton-gin saws



I J. E. CARVER.

Cotton-Gin Saws.

N0.'2I3;I69. Patented Mar. "Q1879.

n'rrnn STATES PATENT FFICE.

JOSEPH E. CARVER, OF MEMPHIS, TENNESSEE, ASSIGNOR TO CARVER GIN ANDMACHINE COMPANY, OF SAME PLACE.

IMPROVEMENT IN COTTON-GIN SAWS.

Specification forming part of Letters Patent No. 213,169, dated March11, 1879; application filed July 30, 1878.

To all whom it may concern:

Beit known that I, J OSEPH E. CARVER, of Memphis, in the county ofShelby and State of Tennessee, have invented a new and improved mode ofapplying and securing saws to the cylinders of cotton-gins, of which thefollowing is a specification:

The ordinary mode of applying saws to the cylinder in cotton-ginsconsists in cutting circumferential grooves or kerfs, properly spaced,in the wooden exterior of the cylinder, inserting the semicircular sawsin these grooves or kerfs, and fixing them with oblique screws.

This common mode is objectionable on account of the liability of thescrews to warp the saws, the difficulty of removing the saws forsharpening, and for other reasons.

My invention consists in connecting the semicircular saws in pairs to asemi-collar or semicircular-bar of iron, which is placed between theirinner margins, and is then secured to the periphery of the cylinder byradial screws introduced between the coupled saws and insertedperpendicularly to the surface of the cylinder, the cylinder havingcircumfer. ential grooves of the necessary width to receive the coupledsaws and the semi-collar to which they are fixed.

In order that my invention may be fully understood, I will proceed todescribe it with reference to the accompanying drawings, in which-Figure 1 is a plan view of a pair of saws fixed to their coupling-bands.Fig. 2 is a side elevation of the same. Fig. 3 is a section in a planecoincident with the axis of the cylinder and on the line 3 3, Figs. 1and 2.

A A represent saws of customary semicircular shape, fixed by rivets orscrews a a to a semicircular bar, B. The pair of saws so coupled areapplied to the periphery of the cylinderC in a circumferential grooveprepared to receive them, as illustrated in Fig. 3, and are firmlysecured by screws D D inserted radially.

By this method the saws are held rigidly in place, and cannot warp. Theyare not strained or otherwise injuriously affected by the screws, as thescrews pass through the semi-collar and not through the saws, and theirpressure is parallel with the planes of the saws and not transversethereto.

The saws are thus rendered stifier, stronger, more durable, more readilyadjusted to the saw-cylinder, and more easily removed for repairs,sharpening, 850.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The saws A A, coupled together by means of collars B, and secured to thecylinder 0 by radial screws D, substantially as and for the purposes setforth.

In testimony of which invention I hereto set my hand.

JOSEPH E. CARVER.

